Impeoved machine foe tempering



- 2 Sheets-8heet 1, J. SMALL.

Machine for Tempering Saws, Files, 6L0.

Patented NOV. 12, 1867.

NO.v 70,755.

Lithographer. Washington. 0 c.

N. PEKERS. Photo- 2 Sheets Sheet 2'. l. SMALL.

Machine for Tampering Saws, Files, &c No. 70,755. Patented Nov. 12;1867.

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JOHN SMALL, 0F vs'r. LOUIS, MISSO URI.

Letters Patent No. 70,755, dated November 12, 1867.

IMPROVED MAGHINE FOR TEMPERING FILES, SAW- BLADES, AND OTHER ARTICLES.

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TO ALL WHOM IT MAY CONCERN Be it known that I, JOHN SMALL, of St. Louis,in'the county of St.-Louis, and State of Missouri, have 'invcntcd'a newand improved Machine to be Used in Tempcri ng Files and Saw-Plates; andI do hereby declare that the following is a full, clear, and'exactdescription thereof, reference being had to the accompanying drawings,making a part of this-specification, in which- Figure 1, sheet 1, is alongitudinal section taken vertically through the machine, in the courseindicated by red line m min fig. I I 1 Figure 2, sheet 1, is a. top viewof the machine. Figure 3, sheet 2, is an elevation of one end of themachine. Figure 4', sheet 2, is a back view of one of theclamping-plates. Similar letters of reference indicate correspondingparts in the several figures. This invention relates to certain novelimprovements on machinery for tempering files, saws, and other plates,which were secured to me by Letters Patent, hearing date on thefifteenth day of August, 1865, wherein the plates to be tempered andstraightened were confined between two ribbed clamping-jaws, during theopera- I tion of cooling them in a liquid bath, so that said plates werethereby prevented from warping.

The invention and improvement provide for constructing the vessel inwhich the plates are immersed in a liquid, either wholly or partly ofglass, or other transparent substance, sothat, when water is used as thecooling bath, the operation of tempering can be seen, and the platesremoved at the propertime from the bath.

.It also provides for the use of a hinged apron, applied to one of twoclamping-jaws, and so operated as to form a support for the files orplates before and after they are tempered, and also as a conductor'for'delivering the files orplates from a furnace into the space between theclamping-jaws. p

It alsoprovides for the use of hooked rods working between theclamping-jaws, and operated, as will. be hereinafter described, for thepurpose of delivering the files or plates between the said jaws,supporting them 'while in this position, and serving asa; convenientmeans for delivering the tempered plates upon a hinged apron to beremoved from the machine. a

It finally provides for moving both blamping-jaws towards and from eachother simultaneously and in parallel planes, by means of right andleft-hand screws, controlled and operated by a single vibrating arm orlever arranged outside of the bath-chamber, asfwill be hereinafterdescribed. a

To enable others skilled in the art to understand my invention, I willdescribe its construction and operation In the accompanying drawings, Arepresents a box or vessel, within which the files or plates areclamped,

and firmly held during the process of tempering them. This box may bemade of glass plates, but I prefer to construct it of wood or metal, orof both of these materials combined, andmake openings through its sidesand bottom for the reception of glass plates, B, as shown infig. 1.These glass plates should be secured tightly around their edges, andproperly sealed, so as to prevent leakage. The object of using glass isto allow the attendant to witness the process of tempering, when wateris used as the bath for the immersion of files. .The

glass sides and bottom to the box ,or bath will admit light into it, andallow of the inspection of thecontents I of the bath. Oneof the sides ofthe box A is inclined in a plane parallel to a partition, 0, whichlatter, with the inclined side of the box, forms the chamber in whichthe operation of-tempering is conducted. Within this chamber twoclamping-jawml) D, are applied, and supported in planes parallel to eachother, by means of four screw-shafts, E E E E, each one of which has aright and left-hand screw-thread upon it. These shafts have theirhearings in the front and rear'sides or'ends of the box A, and passthrough stuffing-boxes a a which are applied to the partition (3.. Onthose ends of the shafts E, which extend through and project from oneend of the box A, pinion spur-wheels b b are keyed, all of which are ofthe same diameter. These pinions Z2 engage with a large spur-wheel, F,upon a short shaft, 0, as shown in fig. 3, to which spur-wheel ahand-lever, F, is secured, by vibrating which the fourscrew-shafts canbe rotated toward the right and loft. Those ends of the shafts E,opposite the ends carrying spur-wheels 6-6, have their hearings in boxescl d, which are secured tightly to the inclined end of the box A, asshown. The right-hand screw-threads of the four shafts E are tappedthrough lugs e e, formed on the ends of the jaw D, and the left-handthreads upon said shafts are tapped through lugs e e', which are formedon the ends of the clamping-jaw D. The holes'through the several lugs ofthe two clamping-jaws D D are made in such manner that these jaws willbe supported in inclined plane's parallel to each other, as shown infig. 1. The jaws D D are made of castiron, somewhat after the manner offire-grates, that is to say they are made up of parallel bars, withspaces between them, which bars are strengthened, so as to resiststrain, by means of cross-ribs ff, as shown in figs. 1 and 4. Throughthe upper end of the jaw D a number of holes are made, through whichrodsg g pass, carrying on their lower ends hooks, and attached at theirupper ends to a cross-head, 9. To this jawl) astandard, H, is secured,which projects upward a suitable distance above the jaws, and carriesnear its upper end pulleys hh. Over one of these pulleys a rope orchain, 1', passes, which is connected to the cross-head 9, so that, bymeans-of the i'ree end of this rope or chain, the

- attendantr an draw up the hooked rods 9, and discharge the files orplates which'may be between the two clampingjawsf The rods gwork in thespaces between the bars of the clamping-jaw D, andthe hooks on the lowerends extend across the space between the two jaws D D,as shown infig. 1. To the uppercnd of the jaw D a plate, J, is hinged, which isequal in width to this jaw, and which is so hinged that, when raised tothe position shown in fig. 1 in black lines, its upper surface will bein the plane of the clamping face of its jaw. To the outer or free endof this plate J short chains are fastened,which are attached to across-head, j. To the centre of this cross-head a rope or chain,'k, isattached, which passes over one of the pulleys at the upper end of thestandard H, and is used for raising or lowering the plate J. The rope orchain k, as well as the rope or chain 2', is loaded by a weight, for thepurpose of counteracting the weights on the opposite ends of these ropesor chains.

When the clamping-jaws D D are separated for receiving a saw or filebetween them, the plate J is brought to a horizontal position, indicatedin red lines, fig. 1, so as to receive the work to be tempered from thefurnace. The work beingproperly put upon the plate J, this plate israised to the position shown in black lines, and the work delivered uponthe hooks. of'rods g. These rods are then lowered, and the jaws broughtfirmly together. In this manner the files, or other plates or blades tobe tempered, are subjected to a bath of water or oil in the box A. Whenthe tempering process is complete, the jaws D D are separated, and thetempered article or articles drawn up by books on rods 3, and deliveredupon the plate J, in the position indicated in black lines in fig. 1.This plate J is then lowered to a horizontal position and the workremoved from it By having the weight on the rope or chain, which isattached to the cross-head of hooked rods 9, very little heavier thanthe weight of these hooked rods collectively, the articles which are tobe tempered, coming upon said hooked rods, will of themselves descendinto the bath between the clamping-jaws.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-- 1. In a machine, which is adapted for temperingfiles or plates, and confining them between clamps during the temperingprocess, I claim constructing the boxcontaining said clamps wholly orpartly of glass, substantially as described. h

2. The construction of the grated clamps l) "D, with bracing ribs upontheir backs, in combination with double-acting screw-shafts for movingthese clamps, substantially as described.

.3. The arrangement of the clamps D D in inclined planes within a bathor box, A, and upon double-acting screw-shafts E, operated and operatingsubstantially as described.

4. The hinged plate or apron J applied to the jaw D, in combination withmovable hooked rods g, substan tially as described. 7

5. The standard H, provided with pulleys 71 it upon its upper end, overwhich ropes or chains pass, which are attached to the hinged apron J,and also to the cross-head of hooked rods 9, substantially as described.

' J OHN, SMALL.

Witnesses:

D. H. Narrow, FRANK FILLEYS.

